reappearance of left module? Options

[mrd33]

i'v used this code:

<style type=text/css>
texttable.left, td.mainleft, table.left, table.navigation,table.footer, table.footernav, table.navigation,table.footer, table.footernav, table.left TH
{display: none;}
</style>

but after that, i can't find my left module, n so i can't find the "look and feel" to click, i donno how to change my layout. wt can i do to make the left module reappear? pls help. ths.